Quote from Tim in Quest for Fire
Tim: I just know that there's a lot of things I want to do. If I don't start doing them now I'll never get them done. Jill: You know, Tim, sometimes when a guy gets to be your age, he goes through this, um... mid-life crisis. Tim: Stop. I'm not going through a mid-life crisis. If I was, I'd be driving a Porsche with a blonde named Chrissie. Which doesn't sound like a half-bad idea. Jill: Yeah, yeah, yeah. Well, you don't have to date Chrissie to go through this. There are other symptoms. Tim: Like what? Jill: Like wanting to give up Tool Time to become a physicist. Tim: That's only part-time. You see how the boys are growing. You've got a new job. I'm just left in the dust, using foreign phrases ad nauseum.